Lovable★4.0 (43)· London

Uses Go, Rust, TypeScript; AWS, Azure, Google Cloud, Cloudflare; Kubernetes, Terraform, Temporal, OTEL, CI/CD; PostgreSQL, ClickHouse, Firestore, Spanner, BigQuery. Builds the platform for Lovable Enterprise enabling secure, cloud-agnostic deployment, defining architecture for sandboxing, networking, encryption, identity, and mentoring engineers.

Koinly★3.0 (1)· London

You will work with TypeScript on Bun, RabbitMQ, Redis, PostgreSQL, Vitest, Sentry, and Rust. The team owns the distributed data-processing backend that ingests, normalizes, and reconciles on-chain and exchange data for Koinly’s crypto tax calculation product.

Lovable★4.0 (43)· London

Build enterprise deployments using Go, Rust, and TypeScript on AWS, Azure, and Google Cloud, with Kubernetes, Terraform, and Temporal. You will build the platform that allows large customers to run Lovable securely and at scale across every major cloud provider.

You’ll design and build high-performance software using Rust, C/C++, React, REST APIs, SQL, Redis, and NGINX. The team is rebuilding legacy institutional investment management systems into a cloud-native platform covering portfolio management, trading, risk analytics, and AI. This is an early-stage, small collaborative team.

You will write performance-critical software in Rust, working across backend services, APIs, and infrastructure—with frontend in React/Next.js/TypeScript when needed—for a global financial services firm. The stack includes Tokio, Azure, Kubernetes, Python, SQL, and CI/CD tooling. This is an early-career engineering role with end-to-end ownership.

American Express★4.1 (9.7k)· London

You will work with Kotlin/JVM, Java, React, Postgres, MongoDB, Redis, Docker, Kubernetes, and GitHub Actions. The Financial Insights and Tools group builds financial analysis software for American Express customers, powered by APIs and underlying platforms for web and mobile applications.

Work with Kotlin/JVM, Java, React, APIs, Postgres, MongoDB, Redis, Docker, Kubernetes, GCP GKE, AWS ECS/EKS, Ktor, Spring, and GitHub Actions. The Financial Insights and Tools group builds customer-facing web and mobile features that aggregate and analyze financial data to enhance personal finance management.

You will work in a Rust stack with Python at API boundaries, using Kafka, PostgreSQL/TimescaleDB/PostGIS, gRPC/protobuf, and Kubernetes. The team builds real-time intelligence infrastructure that ingests high-volume data streams, processes them in real time, and surfaces actionable insights. This is a small, high-impact engineering team inside a scaling company.

Build and launch AI-powered products using TypeScript, React, Node.js, Rust, Azure, Docker, and LLM APIs (OpenAI, Anthropic). As the founding product engineer, you’ll own the full stack—from frontend and backend to AI workflows—and work directly with founders to shape product direction from 0 to 1.

TypeScript, Python, Rust, or C++ for a full-stack desktop application, backend for live data ingestion, and the algorithmic layer bridging research and product. This role is at a stealth-mode AI startup building a proactive AI assistant that maintains a persistent model of user work history. As a Founding Senior Engineer, you will work directly with AI researchers in a small team.

American Express★4.1 (9.7k)· London

Work with Kotlin/JVM, Java, React, Postgres, MongoDB, Redis, Docker, Kubernetes (GCP GKE, AWS ECS/EKS), GitHub Actions, Ktor, and Spring. The Financial Insights and Tools group within Digital Banking builds financial analysis and planning applications for American Express customers on web and mobile, powered by APIs.

Durlston Partners· London

You'll work with C++, Java, Rust, Python, TypeScript/JavaScript, Angular, or React. The deep tech company builds software for humanitarian, surveillance, and defence applications. Lead engineers own technical decisions for a core enterprise product and mentor small teams of 2–3.

Work with Java/Kotlin/JVM, Postgres, MongoDB, Redis, Docker, Kubernetes, GCP GKE, AWS ECS/EKS, GitHub Actions, and frameworks like Ktor and Spring. You'll handle end-to-end delivery of green-field and brown-field software projects, collaborating with customers and product teams.

You will use C#, React, Oracle, Couchbase, Kafka/ActiveMQ/AmazonMQ, Prometheus, Grafana, CloudWatch, and Concourse to build and maintain end-to-end features, scalable APIs, and microservices for broadcast and video workflow solutions.

Wand is hiring a Senior C++ Reverse Engineer to work with C++, the Windows platform, Unreal and Unity game engines, and disassembly. You will own the game engine SDKs, hooking, and cross-DLL machinery that let the company read game state in real time to power mods, maps, and tools for players across thousands of PC games. This is a senior individual contributor role on the native team.

You will lead a team using TypeScript, Node.js, and React on AWS serverless, microservices, and event-driven architectures. The Affinidi Elements team builds a decentralized digital identity platform that gives users control over their data. You will guide the engineering team in delivering high-quality, secure features.

Senior Software Engineer working with **Rust, Golang, or TypeScript** to design, build, and operate scalable systems. You will create and evolve services for the **USA market’s customer digital experience**, including payments, orders, loyalty, and web/mobile applications.

TypeScript, Python, Rust, React, C++, Docker, and Kubernetes. You will build scalable software across Emotech’s AI products and customer platforms, productionising AI prototypes and models from the company’s speech and multimodal research teams.

JPMorgan★3.9 (20k)· London

You will build the next generation global-scale core banking platform using Go, Python, and/or Java, Kubernetes, Terraform, and cloud-native technologies, developing microservices, integrations, dashboards, and CI/CD pipelines. You will work on the Global Banking Platform team at JPMorgan Chase, with an initial secondment to a FinTech partner.

Work with Java, Go, Rust, or Python to design, build, and maintain backend services, APIs, and distributed systems for a regulated blockchain-based wholesale payment and settlement platform. Use AI-assisted development tools and build MCP servers, AI agents, and skills.

Durlston Partners· London

Backend roles use C++, Java, Rust, or Python; Frontend roles use React and WebGL. Full Stack engineers work across both. The company builds the foundational software and AI for the autonomous age, the operating layer that lets organisations task, control, and act on data from fleets of autonomous assets.

TypeScript, React, Rust, Effect, HTML, Material UI, Base UI, Ariakit, and Panda. They build an open-source platform unifying structured and unstructured data to improve simulation, optimisation, and automation of real-world systems.

Proton★5.0 (1)· London

You will work with Kotlin, Jetpack Compose, and an increasingly shared Rust core to build Android applications. You will join a product team working on Proton Drive, Payments, or Account, building privacy-first tools for millions of users.

Build features on a regulatory reporting platform using Python, FastAPI, SQLAlchemy, PostgreSQL, and Docker. You will work with RESTful APIs, Git, and optionally Clickhouse, Go, or Rust on complex data pipelines for a regtech SaaS company serving Tier 1 banks.

Python, FastAPI, Flask, Django, Docker, GitHub Actions, and ML deployment are used in this Senior Software Engineer backend role. The AI engineering team builds technology with measurable real-world impact on how large-scale infrastructure is designed and built.